Riveting machine



Sept. 11, 1923. 1,467,536

n 4. C. DORNIER RIVETING MACHINE Filed June 28. 1924) '4 Sheats-Shet 1 AINVENOR= Sept. ll, 1923. l,467.536

` c. DORNIER RIVETING MACHINB f Filed June 28 1920 4 Sheets-Sheet 2INVENTOR= Se t. 11, 1923. Msmse C. DORNIER RIVETING MACHINE Filed June28 1926 4 stmata-Sheet 5 NVENT R Sept. 11, 1923. 1,467,536

C. DORNlER RI ETING MAGINB Filed June 28 20 4 shows-Sheet ,4.

l 61? of ff Ma al NVLNTOR Patented Sept. 11,1923.

rr rs CLAUDE DORNIER, OF FRIEDRICI-ISHAFEN, GER-TANY, ASSIGNOR TO THEFIRIVI DOR- NIER-METALLBAUTEN, GESELLSCAFT MIT BESCI-IRNKTER HAFTU'NG,OF PRIED- R-ICHSHAFEN, A. B., GERMANY.

RIVETlNG MACHINE.

Application filed June 28, 1920 Serial No. 392,560.

To all whom Z't mag Concern:

Be it known that I, CLAUDE: DoRNIEn, a citizen of the German Empire,residing at Friedrichshafen a/B., Germany, have invented certain new anduseful Improvements in Riveting Machines, of Which the following is aspecification My invention reters to the manufacture of rivetineconnections and concerns a machine allowing to automatically produceriveted plate seams of any length.

The machine forming the object of the present invention and the Workingprocess obtained by its means can be applied to riveting of any pit chrequired, but special advantages are ofl ered -in producing thinwalledsmall-pitch rivetinr connections. For 'by employing this machine closedor open bar-shaped hollow bodies of any length and of Very thin platecan be made, Which are remarkable 'for their great accuracy of pitchsometimes not wider than a few millimeters and for the particularly highresistance o't their Sections. To obtain sections of equal moments ol'inertia (as such are produced by this peculiar automatically progressingrivetin; in rows by means of a machine according' to the invention) isimpossible with rolled profiles to be had in the trade until now, sincetheir sections are as far as their manufacture is concerned, subject tocertain limitations not applying to the present process.

Thus the object ol the invention is a machine for prmlucin long rivetedplate scams and especially riveted sectional bars, in which the partsthat are to be connected enter the machine uupunched. and are underpermanent inthlence o't' a l'eed appliance autoinatically andcontinuously (lriven by the machine according' to the .required pitcll.loreover in a rythmically moving' slide all tools are combined, whichare needed for n nchin 'for introducing the rivet shat't into its holeand for finishing the connection by shaping the head.

In the 'further course of perfection of this invention in the jointslide another tool has been provided for thin plates, Which adiusts the.small rivet shafts asto their position relatively to the thinplates toberv eted and secures them in adjusted position by a moderate clenching.

Furthermore the machine has been arranged so that either at .regula-rintervals or in individual cases required holes punched e. g. forfastening struts Or Other connections later on may be left unriveted onsectionalbars having a length of about 7.5 In. and 12.5 mm. rivetingpitch, the bending bars to be described later being left out, it hasbeen ascertained thatpunching alone'eaused the bar to warp to a-'rise'of 250 mm., punchino; and rivetin'gr toa rise of 500 mm.; this provesthat punching` and riveting participate :fairly 'equally in Stretchingand bending.

Further experiments have been made to the end o't passing the barsthrough the machine and thereby producing' an artificial countenbend,some others being' treated without bending. F or this purpose fourbendlng bars \vere pr0v1ded two of Which were arranged Within' thepunching and.

riveting tools'and twooutside. In the firstcase these four bendinp barswere employed Simultaneously` the ones outside projectin about 1.5 mm.tarther than those inside. In

the second Case the outside bars \vere left out altogether. In the firstcase the punched and riveted bar lett the machine straight inthe secondcase with a warp ot' 120 mm. rise. In this manner the success of anarticial counter-bend was proved.

An arrangement of the machineespecially useful 'for Very long' rows ofrivcts consists according to the invention In USInfI t'orthe feed motionof the parts undergomg the riveting a screw spindle reversible as to.the general transport motion. In spite thereof with small pitchescomprising e. g. a few centlmeters or even inllllmeters only and Withrivetlng scams severalmeters long the prescribed distancebetweea thetirst and the last rivet hole can be approXimately maintained only onaccount of the unavoidable Stretching. In some cases this. does notmatter; but when the highest ac-- curacy is required, as e. g. in makingboom. members and girders for air craft, the' Stretching of the materialcaused by the: punching and riveting process must be taken intoconsideration.

In developing' this nvention further this: is effected in an especiallysimple manner meeting all Other requirements by influencing the feedappliance by a compensating" arrangement, which in progressingautomatically compensates the small deviatlons' from the pitch caused bythe Stretching of the material during` punching and riveting' anddiffering according to the material and to the chosen shape of profileor number and distribution of the rows of rivets.

In the drawings aflixed to this specifica-- tion and forming partthereof, a modifica-- tion of a riveting machine according to thepresent invention iS illustrated by Way of example. This is a machineespecially suited for producing riveted hollow girders possessing wallsVery thin as compared to theother dimensions of the section. It has beenassumed that a boom member destined for air craft and highly accurate isto be made by means of two continuous scams of riVets: from twosectional strips of thin steel plate.. The machine to be described showsall peculiarities previously mentioned and some more, Which arecomprised within the range of the invention.

In the drawingsz Fig. 1 is a longitudinal front 'View of the ]Middlepart of the complete machine,

Fig. 1 is a sectional View of the feed mechanism on the line 1`* -1 inFig. 2.

Fig. 2 is a plan, partly in section along line 2-2 in Fig. 1.

Fig. 3 front View onlarged in comparison to Fig. 1 and showing' the partof the machine where the compensating appliance is treated.

Fig. 1- is the corresponding plan,

Fig. 5 a section along line 5-5 in 4, again on a larger Scale.

Fig. 6 a longitudinal sec-tion along 6-6 in Fig. lshowing a detail.

Fig. 7 a transversal section along 7-7 in Figs. 3 and 6.

Figs. S and 9 are Vertical partial sections along lines 8-8 and 9 9 inFig. 2 on a larger Scale.

Figs. 10-12 details of the riveting machine on a' highly enlarged Scale.

Fig. 13 a section across a profile strip immediately before riveting.

Fig. 14: on a larger Scale a longltudinal View corresponding to Figs. land 2 of the part of the machine cemprising the means employed forproducing the counterbend line line

.and the individual tools for punching the profile bar, for introducing,adjusting and firstly clenching the riVet and for Shaping 'the head.

Fig. 15 a corresponding plan.

Fig, 16 a Vertical section along line 16 16 in Figs. 14 and 15.

Figs. 17 and 18 a: diagram of the working process of the machine.

One of the chief parts of the combined :machine shown in the drawings isthe actual riveting machine A containing the tools for punching theprofiled steel plate strips, for 'introdueing and cutting off theriveting material in wire-shape, for introducing the rivet shafts intothe riVet holes` for adjusting the riVet shafts and for finishing theriveting connection, and besides containing the parts operating the feedmotion. An other chief part of the combined plant is formed by a machinebed B extending about equally far on both sides of the riveting machineA; this bed serves to support the most essential parts of the feedmotion, the appliances for producing an absolutely eX- act pitch and asa general bearing and support of the unpunched plate strips and of theriVeted profile bar. The middle tableshaped part of the machine bed B isrigidly connected with the riVeting machine. Here 'there are arrangedmost of the appliances securing a good joining and introducing of theunpunched profile strips into the riveting machine and the appliancescounter-acting the one-sided Stretching of the plate caused by thepunching and riveting and generating a turning or twisting of thefinished profile bar.

The intrnsc riveting machine A is in its outer appearance and in itswork substan tially Very much like the eccentric presses or punchesknown, but shows as compared to these certain peculiarities importantfor the exploitation of the idea of the invention: on guide bars (7there glides a main slide C,

which is connected by means of aunivcrsal joint with a main eccentric a?arranged on the dri ing shaft .Tn the main slide C an auxiliary slide Dis guided which is driveuby an auXiliary eccentric (6 arranged also upondriving' shaft The auxiliary Slide governs the Vertical motion of aplate clamp E fitted with three thumbs 6 and serving to clamp the platesduring the punching and'riveting. In order to allow for the varyingproperties of the material of the profile strips F to be riveted and forthe Variable pitch, the plate clamp E is not rigidly connected with theauxiliary slide D. as can be gleaned from Figs. 10-12.

'It is guided laterally by a tool holder E Which due to a horizontalguiding groove C provided in the main Slide C can be Shifted laterallyWithin certain limits, but after being adjusted is rigidly fastened tothe main slide C by a set-screw R and thus forms with it a unit. Theupper part of the plate clamp E is inserted in the front part d of theauxiliary slide D, in which Some space is provided for this purpose, sothat it is positively entrained in every upward stroke of the latter. Onthe other hand it is influenced by springs S also arranged in the front(i of the auxiliary slide D and acting on a transmission plate S Thesetend to press the plate clamp E permanently downwards and during thedown stroke of the auxiliary slide press the profile strips F togetherelastically or press them upon some abutment 6 The latter is arrangedupon a table-shaped top plate A of the riveting machine and allows ofbeing shifted sideways.

The substantially tube-shaped plate clamp E and its abutment 6 serve atthe same time for receiving a punch E which at the bottom is guidedaccurately in the lower part of the plate clamp, on top in aninterchangeable guiding plate 6 resting on the tool holder E The upperend Of the punch E is formed with a head 6 'pressed against' an upperpressure face GG of the tool holder E by a spring T pressing fromunderneath. Thus the eXtraeting of the punch fron'i the punched profilestrip F is not effected rigidly but elastically. All other parts of thepunch are somewhat thicker .than its free bottom end, which does thepunching. As the shaft is comparatively long the thin punching endcannot run out. On the other hand there is no danger of jamming and thusof a breaking of the punch supported on the one hand in the main slide Cor in the guide plate 6 rigidly connected with this during working andon the Other hand in the plate olamp E possessing a Comparative motionrelatively to it. Thus it is possible to punch thousands of rivet holesof 2 OI' less millimeters diameter in high class steel before the punchwants renewing.

As soon as in the up-stroke of the auxiliary slide D the profile stripsF shortly before relieved from the punch E are no more under the elasticpressure of the plate clamp E, they are shifted the distance of onerivet at a time from right to left (referring to Figs. 1. 2, 3, 4) bysome device described later. In order to simplify the drawing, a rivethole is assumed to be just in the position needed for introducing therivet shaft.

A short distance behind this rivet hole (Figs. 1, 2 and 9), which in themodification illustrated has a (listance latcrally of two pitchunitsfrom the p'unch Ethe tableshaped top plate A possesses a slenderslightly conical opening (L Its upper part is formed referably by anoZZle inter- Changeable (not shown in the drawing) Which has a bereorrespondng to the diameter of the wire. The opening (t continuesdownwards 'in case A. and serves as guiding channel for a riveting wireG running off a reel G arranged in the bottom of the riveting machine. Apush clamp G controlled by an eccentrie (6 and a transmission rod pushesupwards in each stroke a piece of the wire G corresponding to therequired shaft length. Above the push clamp the riveting wire G is leadthrough a stretching appliance r constructed at the same time as anarresting appliance acting from one side. b

' For Cutting ofl" and transporting the wire bit used as rivet shaft aknife Gr" isprovided which is shaped as a fla-t slide (Figs. 2 and 9)`whose motion is commanded from driving shaft (1 by means of agear fl lnthe position of rest of the knife (Fig. 9)"an opening made for receivingthe free wire end is disposed eXactly above the conical opening (T sothat the wire pushed upwards by the push clamp G meets with noresistance. During the ensuin'g up-stroke of rod (7 the knife G isshifted forwards, cuts ofl" the wire end and transports it to immediiately above the rivet hole mentioned above of profile Strip F. lVhilethen the knife does not move for a while, the main slide C sinks down.In' its guiding groove'c it has a holding piece G with an. inserted pinG The pin presses the Cut-off wire bit from the opening of the knifeinto the rivet hole undernezith and then is entrained by the main slidegoing up, while knife G is pulled bacl'so as to Cut ofl' another bitduring the next strolre of the machine. To prevent the rivet shaft whichis in no way clenched until nowfroin falling out, the top plate A has aguide bar (t narrowly underneath the, profile strips F.

When the next feed stroke the pair of profile strips with therivet'shaft has advanced another rivet distance, the rivet shaft comeswithin reach of a straightening and clenching tool H and 'H actingfromiboth sides i. e. from above and from underneath. The upper andlower part of this tool are hollowed out like a Cup and when movingtowards each other straighten and afterwards clenCh the rivet shaft fromboth ends in its right position relatively to the Dlates.

After another feed movement the slightly clenohed rivet shaft comeswithin reach of a lieader made in two parts.

n the Construction illustrated (especially Figs. 1, 2` S and 14) bothtools are shaped very similarly as to their Original outward appearance.The guiding groove 0 of the main slide C contains a tool holder H' inwhich, displaced one ri vet distance, a cleneher H and a header FR areinserted. At a Certaindistance below them there is an upholder H movingvertically in the top plate Showing a corresponding hole. It is fitted.

with the necessary counter forms for straightening and clenching and forheading the lower half of the rivet. Its working stroke directed'upwards is worked by a twoarm lever L as soon as its free end is presseddownwards by a governing bolt (6 (Fig. 8) arranged on the main slide C.

In order tokeep the unpunched profile strips in the correct mutualposition also with relation to the tools just described, apart from theknown and not shown sup port by Vertical and horizontal rollcrs (ifrequired by rollers in slanting position as well) certain adjustableclamping appliances are provided. They consist of the clamping bolts J,three of which are schematically shown in Fig. 2, while in Fig. l theyhave been left out for clearncss' sake.

The clamping bolts encircle by their in terchangeable jaws fitted tomatch the individual profiles completely` or par'ly the unpunched andsometimes highly springlke profile strips and the first part of theriveted profile bar. They can be turned and shifted in many ways and areadjusted diffcrcntly to match the handled material. But invariably theyare arranged so that not only the parts to be joined are cXactlyunderneath the tools, but that the profile Strips arrive underneath thetools with some side tension or counter-bend. This positive di viationfrom the straight line demanded in the finished work piece is doneaccording to the invention by means of the adjustable clampingappliances, s-o that under the influence of the one-sided Stretchingconnected with punching and riveting a body is formed with a row ofrivets running absolutely straight. The counter-bend is mostly ratherSmall, so that in Fig; 2 the mutual deviation of the aXes Of the threeclamping bolts cannot be gleaned.

In order to ensure the even transportof the profile strips according to'the invention, all direct pulling or pushing of the profile strips bymeans of clamps, pinches, etc. has been avoided and the riveted profilebar is fed forwards by a separate pulling appliance.

The machine bed consists substantially of a long sturdy channeled girderB (Figs. l and 2), which is supported on both sides of the rivetingmachine A by supporting posts 13 and whose middle part is rigidlyfastcned on the bottom side of the table of the riveting machine. In thegirder B a sturdy screw spindle B of, a length equalling about half thelength of the girder is shiftably but in general non-rotary supported.Both ends of the screw spindle B are fastened nOn-shiftably in acarriage B each. The carriage 13 can roll along the girder B by means ofWheels b In the left carriage the head end of the profile bar F is madefast under insertion of a compensatioudevice. To begin with,. thecompensation device should be imagined to be out of action. Then theheadOf'the'profile baris in rigid connection with theleft hand carriage ]3 For working the feed: motion a tooth wheel E rests underneath the girderB shortly before the riveting machine A. On the same shaft are arrangeda ratchet Wheel b and a hand wheel b The former .is advanced by means ofa pawl b carried by a link ?9 rocking about the aXle of Wheels b, 5 andanadjustable transmission gear b from a commanding shaft a at everystrole of the machine. The screw spindle B? serving as a gear rack isdriven forwards the distance of one rivet at every stroke and pulls theprofile bar F to the left the same distanceby'means of the carriagc B.

It Would be very dificult or impossible to manufacture a real gear rackaccording to the processes used for the purpose which possesses anabsolutely exactpitch on account Of its great length of 10 meters .andmore. For this reason according to the 'invention a screw spindle hasbeenchosen, as into this a veryeXact thread can be Cut without any:great difficulties. Thus even in using a pitch of a few millimeters thegreatest accuracy of the single rivet distances as an exact distancebetween the first and the last rivet hole is obtained. A furtheradvantage consists in the fact that, When One side of the screw spindleis worn out, it can be turned a certain angle and thus a completely newgear rack is obtained.

If the screw spindle just mentioned is not to be used as gear rack, itcan be employed as a compensation device, which in progress ingautomatically corrects the minor faults of the pitch caused by theStretching of the material during the punching and riveting and bysimilar sources of error. If e. g. the riveting vpitch be 20 mm. andthere be a deviation of 0.03 mm. between two rivets, the figure is verysmall in itself, but accord ing to the very largenumber of rivets in aprofile bar of. 10 meters the resulting deviation is 15 mm. Thus withlong girders it is out of question to observe exact end dimensions. Inorder to obtain any required degree of accuracy as to end dimensions thescrew spindle can be turned after every stroke of e. g. after 10 strokesof the main slide C by means of a separate ratchet gear for a certainamount in such a manner that the actual feed of the spindle is made asan average 0.03 mm. larger than it would' be without the turning motionof the screw spindle.

In the specimen construction this kind of compensation has not beenemployed, so that the comparatively heavy spindle ]ZV-which cannoteasily be turned-rests generally nonrotary in carriage 13 Thecompensation is with it.

done instead by means of the appliance described in the following, whichScarcely requires any transporting work (Figs. 8.-7);

The left hand carriage ]3 (Fig. i) has about at the Centre height of theprofile bar F a supporting rod K arranged in parallel to the spindle Bupon which near its free end a guii ling piece K is rigidly fastened. nthis guiding piece l a short draw-bar K rests, which by means of abar-shaped extension I' is firmly connected with the head of profile barF. On the 'front ond of dra`.v-bar K a nut M of a Inicromcter screw isarrangcd rotary but non-shit tably which partly forms a ratchet wheel.The bolt M belonging to this nut and equally arranged in parallel 'tothe screw spindle B is rigidly tastened in the upper part of carriage B.\Vhcn nut M is turned relatively to the end ot the bolt fitted withthread m this nut M changes its distance from carriage 13 Upon nut M adriver M turns, which on the one hand possesses a pawl 'm and on theother hand a return pn m rigidly connected The return pin slides in thefree end of a strong spiral spring m whose case m is rigidly connectedwith the Inicrometerscrew bolt M The spiral spring tends to press thereturn pn against a set-screw m (Fig. 7) serving as adjustable limitingpiece provided in a limiting collar m which can be jammed upon thescrew-bolt M y If'the return pin m rests against the set-screw m in itsnormal position, the driver M fitted with a roller m On its upper endslides along a guiding bar N on top, which is arranged in parallel toscrew spindle ]3 above the part of girder B carrying the carriage 13 andeXtends over the whole length of this part of the girder. Bent barsupports n fastened atcertain intervals on girder B (on the left in Fig.5) hold the guiding bar N in position. The guide bar has on its upperside at regular intervals, e. 100 mm., trapesoid bosses a Whenever thedriver M in feeding hits against Such a boss with its roller m it isturned against the tension of Spring m a certain amount and carries theratchet Wheel or nut M by means of the pawl 777, thus displacing the nuta little relatively to the screw-bolt M After passing the boss n thedriver M is turned into home position by the return pin m under thetension of spiral spring 777 while the pawl glides over the ratchetwheel of nut M without feeding. It can be seen at once that in this waythe profile bar F is displaced a little relatively to the screwspindle Bat regular intervals corresponding to the intersections of guiding bar Nby the bosses n Thus any deviation from the pitch caused by some reasonCan be compensated with the accuracv required in rivet scams of anylength. The compensation de' vice is otherwise constructed so that byits working the pitch can as well be enlargede. 'if the :feed hasbeen-chosen insuficent- 'as also be reduced.

inventiou a special kind of supports have been provided, which accordingto the progressing ot' the profile bar inSeI't theinselves automaticallyand during the return motion ot the carriage, e. g. if a second or thirdrow of rivets is to be made, are automati-j cally removed as well.

. For this purpose at intervals and out of reach of the carriage 13(Fig. bent supporting posts O are rigidly fastened on the U-section B.Each supporting post has a pillar head 0 turning upon a Vertical aXis,whose lower end has an arm 0 for support- .ing the riveted profilestrip. v It is now neces sary to swivel arm 0 which happens to be withinreach of carriage B from its posi tion parallel to the screw spindle Binto the position Vertical to it andthereby below the profile strip;

The pillar head has in its top portion two horizontal notches o standingperpendcular on One another. 'A 'bent support is fastened on post O,whose arm P is parallel to post O is at itsfree end changed into aspring rest p .A blade fspring 79 attached to this presses permanently acarrier T with roller t turning in the upper part of arm P upon the'pill'ar. head 0 It tends to hold the latter in either'of the two limitpositions,

in which the notch O runs in parallel to screw-spindle ]3 while theother stands at right angles and serves as an abutment for the carrierT. Underneath the notches the pillar head is constructed in the shapeofan angular catch like the reverse catch of a planing machine, who searIns 0 and 0' in parallel to either of 'the notches .o are arranged'intwo planes one above the other. The arm parallel to screw spindle B e.g. 0 hits with its outer edge against a screw corresponding to it, e. g.p two of which are provided as adjustable Stops 79 and on spring rest pOn the inner edge of this "arm 0 a driver pn (1 just tails to catch',

which is' combined with another driver pn 9 arranged somewhat fartherbelow in a pin' holder Q. On the' pair of-driver pins 9 g a slide (Fig.3) is fastened which possesses two slanting faces 9 The pn holder Q is`clamped tightly upon the free endof'the supporting rod K. The other arm0 belng at right angles to the screw spindle 1s in the way of the seconddriver ping As may be seen fromfFig. 4 and '5, each of the catch arms 0o is .in the home position shown in Fig. 4:, when the pair of driverpins 9 9 is on its right, i. e. between it and the riveting machine A.WVhen during the feed motion carriage 13 and With it the pair of pins gg and the slide Q1 moves to the left, the carrier T, after the carriage13 has passed, is lifted by means of the slide q i. e. its left slantingface,.and of roller t from the corresponding notch 0 of the pillar headand thus this latter is released. Now the catch 0 0 is turned by thebottom driver pin 9 in the direction of the clock hand about 90,whereupon the carrier snaps into the other notch facing` it,' and thussecures it against being turned any further.

' The catch remains in this on position until carriage 13 afterfinishing a row of' rivets is being pulled back to the :right by meansof hand wheel b or rather the pin holder Q always keeping in advance forthe length of the supporting'rod K, which by means of the upper driverpin g turns it back into the home position shown in Fig. l.

` In parallel to arm 0 and pointing in the same direction a support 0 isclamped on pillar head 0 underneath the catches 0 o (Figs. 1 and 2),which preferably on its free end` has a supporting roller for theprofile strip F; the roller is not shown in the drawing.` According tothe description the supports s'wivel in and ont absolutely automaticallyand safely without any detrimental in fiuenee to the machine bed, to thefeed appli ance or to the compensation device.

In all details of the who'le'machinery adjusting devices are providedwhere required which within certain limits given by the size of themachine and its special application allow to adapt it to the individualkind of riveting connections, which are to be made. Though themodification shown and described is especially destined for making thin-Walled riveted hollow bars; it may be employed without any substantialalteration for connecting large sheets Of plate by single or severalrows of rivets. By a machine constructed correspondingly larger withoutany substantial modifications Of its Construction, riveting ofstructural parts can be done, as are used in the erection of buildings,in bridge constructions and in the construction of railway lines. It isnot'diificult to manufacture e. g. girders and posts for ar-`chitecture, long-stretched booms: for bridges and shipbuilding andriveted frame parts for locomotives and other vehicles by means of amachine representing the object of the invention, because such a machinecan always be put to great use where a large number of rivets have to beproduced in continuons rows. i

If in a machine only a few. 'as it were, standardized pitches are usedlthe separate tool holders which in the modification on the main slide,can -be combined in one tool holder for one pitch and equally thecounter tools can be arranged on plates in- -terchangeable as a whole.The latter is esthe more complicated punching tool E is' two rivetdistances apart from the introducing tool G If the pitch is reducedfurther, the distance between two tools following one another directly EG H and H can easily be chosen equal to twice the rivet distance, asshown in Fig. li The upper part of this figure corresponds to a partialview similar to thatin Fig. l and 14. The middle part signifies thearrangement of each one of the tools for punching, introducing, firstclenching and heading by means of G/O, (LU, (LV, and (LO as anindependent unit. The lower 'part shows a piece 'of a bar F, whose'pitchcorresponds to half the distance of two tools following one another. Itcan be seen at once that some point of the bar happening to be arrangedunderneath a certain tool will get under the next tool after the second'feed movement but that after setting 'the machine to work each toolcomes into action once at every feed movement. \Vith small pitches andaccordingly thin plates the velocity of.

riveting can even be enlarged e. g. doubled, if each. tool is providedtwice in direct series corresponding to the threefold rivet distance andthe feed is made twice the rivet distance.

This is proved by the' schematical Figure 18, which in the first lineshows two identical tools E for punching (O), G for in-` trodueing(III), H for slightly clenching (V) and H for heading AS the series a, b7), Q of the pitch nnderneath shows, the two tools of the same kindfollow each other at three rivet distances, while the adjoining tools ofdifferent kinds have a distance of a single rivet. The triangle offigures shows that in the beginning (in position I) only Spot 1 ispunched by the punch of series (L, while the punched Spot 1 and theunpunched spot 2 are below series and 7). After another feed movement ofdouble rivet distance in' position III the spots 2 and 5 are punchedsimultaneously by the punching tools of series d and [l and into thepunched Spot I a rivet shaft is introduced by the introducing tool ofseries e. The punched Spot 3 and the unpunched Spot 4: are below therows (f and b reefrom tools.

After S feed movements of double rivet distance in position IX the spots14 andl' are punched simultaneously, the holes 10 and 13 provided with arivet shatt each, the rivet shatts ot' spots G and 9 are slightlyclenchcd'and those of spots 2 and 5 headed, as the lower row shows by'the non-hatched signs. In Spots 1 and 3 the heading` had taken placealready in positions VII and VIII. After the next feed movement therivets of spots at and 'T will be headed, those of spots 8 and 11slightly clenched, those of spots 12 and 15 provided with rivet shaitsand spots 16 and 19 punched, etc. Thus after each further feed movementof double rivet distance all eight tools work together in such a waythat each time two rivets are made. Though tw o simultaneous rivetingsare displaced for three units the individual pairs supplement each others o'-as shown in Fig. 'LS-that a continuous riveting is done, as inposition-VII the' rivet l, in position (VIII the rivet 3, in position IXthe rivets 2 and 5, in 'the next position the rivets L and '7, then thervets (3 and 9 etc. are finished.

Though the invention concerns in the first line the especiallyadvantageous production of long straight lines of rivets, it can be apglied at once to the production of rows of rivets, arranged in a circle.H for instance two junk rings are to be riveted upon one another, it isadvisable to claiap them upon a Circular table rotary upon an aXle,whose distance 'troni the riveting machine can be varied, and commandedcorrespondingly by the l eed'motion of the riveting machine.

- Naturally the separate tools provided in the riveting machine must bearranged in the mantle face of the circle of the rivet holes made at thetime, if they all are to work at every stroke of the machine. As in thiscase separate tool holders are needed for every riveting crcle and everypitch, it is advisable to provide the slide with an automatically turnedrevolving tool box, so ,that the individual tools work one afteranother. In a similar manner the idea of the mechanically progressingmotion of the work piece, of its punchin, of the introduction of theriveting' wire and of finishing the riveting connection can be realizedas well in rows ot rivets. in which the single rivet shafts have aradial direction. For straight rows of rivets the use of a revolvingtool boX is equally teasible but apart from a few special cases lessadvantageous. as generally only one tool works at the same time and thusthe riveting process is carried out somewhat slower.

Besides the drive of the tool slides can, instead of by means ofeccentrics, be done in any other Way, e. g. by hydraulic action. On theOther hand the rivet holes need not, as in the modification described,be made by punching, but especially in thick plates they can be boredmechanically, if the material is to be treated especially tenderly.

In order to be able to leave out rivet holes in certain places, it isadvisable to provide a disengaging device i'or the pnsh clamps (notshown in the drawings), so that the cutting and introducing applianceStrikes empty. Equally, it' the .material is not to be punched incertain places of the pitch, the punchingmachinery can be disengaged.li' between this and the counter face' of the main slide a removablepresser piece is in serted, punching can be prevented most easily byremoving it. But care has to be taken that simultaneously with settingthe punching tool out oI" action the appliance for the introduction ofthe rivets is set out, of action too. If such passover places occur atregular intervals, when e. g. boom members are riveted which later onare to be united to some girder or lattice work by in- Serting fillingbars, it is advisable to provide further governing devices, Which workautomatically the engaging and disengaging of certain tools.

I wish it to be understood that do not desire to be limited to the exactdetails of construction shown and described for obvions modificationswill occur to a person slilled in the art.

I claim:

1. Ina riveting machine in combination, a tool carrier adapted toreciprocate rel tively to the workpiece, means for automatihead forming'tool, a rivet inserting tool and a tool for adjusting and clenching theinserted rivet on said tool carrier. l

2. In a riveting machine in combination, a tool car ier adapted toreciprocate relatively to the Workpiece, means for automati callycarrying the workpiece step by step past said tool carrier` a punch, arivet head forming tool, a rivet inserting tool and a tool for adjustingand Clenching the inserted rivet on said tool carrier and means in frontof said tool carrier for slightly bending the workpiece.

3. In a riveting machine in combination, a tool carrier adapted toreciprocate relatively to the workpiece, means 'for automat icallycarrying the workpiece step by stop past said tool carrier, a punch, arivet head forming tool, 'a rivet inserting` tool and a tool foradjusting and clenching the inserted rivet on said tool carrier andmeans for compensating the elongation of the workpiece resulting fromthe punching; and riveting operations. i

4.. Ina riveting machine in combinatihn,

cally carrying the workpiece step by step l past said tool carrier and apunch.` a rivet ile a tool carrier adapted to reciprocate relatively tothe Workpiece, means for automaticaliy carrying the Workpiece step bystep past said tool carrier, a punch, a rivet head orniing tool, a riVetinserting tool and a tool for adjusting and cienching the inserted rireton said tool carrier and adj ustable guides gripping the Yy'orhpicce d sposed in 'front of said tool carrier so as to slightly bend theworkpiece.

In a riveting machine in combination, a Workpiece carrier, a stationaryscrcW spin die and means in gear with said spindlc for carrying saidWorkpiece carrier &long said. spindle. t

G. in a riveting machine ii combination, a tool carrier adapted toreciprocate relatively to the Workpiece, means comprslng a stationaryscreW spindle for autcmaicaily carrying the Workpece step by step pastsaid tool carrier and a punch, a ]jiret head forming tool, a rivetinserting tool and a tool for adjusting and cienching the ir: sertedrivet on said tool carrier.

In a riveting machine in combination, a tool carrier adapted toreciprocate relatively to the Workpiece, means for auto maticailycarrying the workpiece step by step past said tool carrier, a punch, arivet head forming tool, a rivet inserting` tool and a tool foradjusting and clenching the inserted rivet on said tool carrier, a nut,means :for intermittentiy turning said nut and a screW belt in gear Withsaid nut and connected With the Workpiece.

8. In a riveting machine in combination, a tool carrier adapted toreciprocate relatively to the workpiece, means for automaticailycarrying the Workpiece step by step past said tool carrier, a punch, :irivet head forming tool, a rivet inserting tool and a tool for adjustingand clenching the insertcd rivet on said tool carrier and means forthrowing one of said tools out at pre determined intervals.

9. In a riveting machine in combination, a tool carrier adapted toreciprocate relatively to the Workpiece, means for automaticallycarrying the Workpiece step by step past said tool carrier and a punch,a riVet head 'Orming tool, :a rivet inserting tool and a tool foradjusting and ,clenching the nserted rivet on said tool carrier, saidtools being spaced apart for the distance of more than One step.

10. In a riveting machine in combination, a tool carrier adapted toreciprocate rea-- tively to the workpiece, means for automaticallycarrying the Workpiece step by step past said tool carrier and a punch.a rivet head formng tool, a rivet insertiug tool and a tool voradjusting and clenching the inserted rivet on 'said tool carrier, partof said tools being provided in a plurality of specimens and beingspaced apart 'for the distance of more than one step'.

11. In a riveting machine in combination, a tool carrier adapted toreciprocate relatively to the workpiece, means for automaticailycarrying the Workpiece step by step past said tool carrier, a punch, arivet head forming tool, a rivet inserting tool and a tool for adjustingand clenching the inscrted rvet 'on said tool carrier, and Workpiecesupporting members movably arranged in the pat-h of the work-piece.

12. In a rveting machine in combinaticm, a tool carrier adapted toreciprocate rcla tively to the Workpiece, means for autematicallycarryingthe WOrkpiece step by step, past said tool carrier, a punch, arivet head forming tool, a rivet inserting tool and a tool for adjustingand clenching the inserted rivet on saidtool carrier, Workpiecesupporting members arranged near the path of the Workpiece and means'for temporarily throwing Said members in Operative pos-` tion, When theWork advances.

In testimony Whereof I affiX my Signature.

CLAUDE DORNIER.

